Deliberate withholding of funds

I sold my property in Nov 2019 and registration took place on 02 Dec 2019. FNB still took off my monthly debit order on 28/11/2019 saying that this will be paid back once the bond has been registered in the new owners name. I followed up beginning Jan 2020 on when I will receive my money back and was told that there is a 40 day waiting period and I will receive my money back on 31 Jan 2020. I followed up again on 11 Feb 2020 (day 61) on when I will receive my payment and I was told that the person dealing with my account will phone me back. I am still waiting. Is FNB deliberately withholding people's money?